How should lyophilized peptides be stored?
In lyophilized (freeze-dried) form, peptides are at their most stable because the absence of water slows the reactions that degrade them. The standard conditions are frozen storage, a desiccated environment, and protection from light.
Under those conditions a lyophilized powder is generally stable for long periods. The specific window depends on the compound — the table below lists the documented specifications from current dossiers.
How should reconstituted material be handled?
Once a peptide is dissolved, it is in a more reactive environment and its stability window shortens considerably. A reconstituted preparation is typically held refrigerated (around 2–8°C) and protected from light, and is used within a defined period rather than stored indefinitely.
For longer holds of a prepared solution, some workflows aliquot the material and freeze the aliquots so that each is thawed only once. The aim throughout is to limit how long the material spends in solution and how often it is disturbed.
What are the documented storage specifications?
The specifications below are pulled directly from current Luvaminos research dossiers — the same source of truth the Research Library renders.
| Compound | Lyophilized (powder) | Reconstituted (in solution) |
|---|---|---|
| GLP-3 (RT) | -20°C (-80°C long term); powder typically stable ~24 months. | -20°C ~1 month; 2-8°C for short-term working use only. |
| GLP-1 (SM) | -20°C (-80°C long term); powder typically stable ~24 months. | -20°C ~1 month; 2-8°C for short-term use only. |
| GLP-1 (TRZ) | -20°C (-80°C long term); powder typically stable ~24 months. | -20°C ~1 month; 2-8°C for short-term use only. |
| AOD-9604 | -20 °C or colder, protected from light and moisture; stable for extended periods when kept frozen and sealed. | Stable in solution for several weeks at -20°C; 2–8°C suitable for short-term laboratory use only. |
| MOTS-c | -20°C; powder typically stable ~24 months. | 2-8°C short-term; -20°C with carrier protein (0.1% HSA/BSA) recommended for longer-term storage; aliquot to minimize freeze-thaw. |
| AMY (CG) | -20°C (-80°C long term); powder typically stable ~24 months. | -20°C ~1 month; 2-8°C short-term; formulate at low pH to limit fibrillation. |
Representative storage specifications, pulled from current Luvaminos research dossiers.
Why do freeze-thaw cycles matter?
Each freeze-thaw cycle exposes the material to mechanical and chemical stress as ice forms and melts. Repeated cycles accumulate that stress and can degrade a peptide over time, which is why minimizing them is a common handling goal.
Aliquoting a reconstituted solution into single-use portions before freezing means each portion is thawed once, sparing the rest of the material from repeated cycling.
What handling practices preserve integrity?
Beyond temperature, a few routine practices protect the material across its working life.
- Keep powder desiccated and sealed until it is needed
- Protect both powder and solution from prolonged light exposure
- Let frozen vials reach a stable temperature before opening to limit condensation
- Label aliquots and lots so material stays traceable to its Certificate of Analysis